1 #ifndef __CPUHOTPLUG_H 2 #define __CPUHOTPLUG_H 3 4 enum cpuhp_state { 5 CPUHP_OFFLINE, 6 CPUHP_CREATE_THREADS, 7 CPUHP_NOTIFY_PREPARE, 8 CPUHP_BRINGUP_CPU, 9 CPUHP_AP_IDLE_DEAD, 10 CPUHP_AP_OFFLINE, 11 CPUHP_AP_NOTIFY_STARTING, 12 CPUHP_AP_ONLINE, 13 CPUHP_TEARDOWN_CPU, 14 CPUHP_AP_ONLINE_IDLE, 15 CPUHP_AP_SMPBOOT_THREADS, 16 CPUHP_AP_NOTIFY_ONLINE, 17 CPUHP_AP_ONLINE_DYN, 18 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 19 CPUHP_ONLINE, 20 }; 21 22 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 23 int (*startup)(unsigned int cpu), 24 int (*teardown)(unsigned int cpu)); 25 26 /** 27 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 28 * @state: The state for which the calls are installed 29 * @name: Name of the callback (will be used in debug output) 30 * @startup: startup callback function 31 * @teardown: teardown callback function 32 * 33 * Installs the callback functions and invokes the startup callback on 34 * the present cpus which have already reached the @state. 35 */ 36 static inline int cpuhp_setup_state(enum cpuhp_state state, 37 const char *name, 38 int (*startup)(unsigned int cpu), 39 int (*teardown)(unsigned int cpu)) 40 { 41 return __cpuhp_setup_state(state, name, true, startup, teardown); 42 } 43 44 /** 45 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 46 * callbacks 47 * @state: The state for which the calls are installed 48 * @name: Name of the callback. 49 * @startup: startup callback function 50 * @teardown: teardown callback function 51 * 52 * Same as @cpuhp_setup_state except that no calls are executed are invoked 53 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 54 */ 55 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 56 const char *name, 57 int (*startup)(unsigned int cpu), 58 int (*teardown)(unsigned int cpu)) 59 { 60 return __cpuhp_setup_state(state, name, false, startup, teardown); 61 } 62 63 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 64 65 /** 66 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 67 * @state: The state for which the calls are removed 68 * 69 * Removes the callback functions and invokes the teardown callback on 70 * the present cpus which have already reached the @state. 71 */ 72 static inline void cpuhp_remove_state(enum cpuhp_state state) 73 { 74 __cpuhp_remove_state(state, true); 75 } 76 77 /** 78 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 79 * teardown 80 * @state: The state for which the calls are removed 81 */ 82 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 83 { 84 __cpuhp_remove_state(state, false); 85 } 86 87 #ifdef CONFIG_SMP 88 void cpuhp_online_idle(enum cpuhp_state state); 89 #else 90 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 91 #endif 92 93 #endif 94